Fresh off sweeping Rafael Nadal in the Shanghai final for his 94th career title, Roger Federer has set his sights on a seventh ATP World Tour Finals championship in London next month.

"London is my priority now and I really want to win the World Tour Finals," Federer told Sky Sports. "I am very excited to have had the year that I have had and everything that comes from here is a bonus."

The second-ranked Swiss trails world No. 1 Nadal by 1,960 points for the top spot.

Federer, who is scheduled to play his hometown tournament of Basel followed by the Paris Masters before the year-end finale in London, says it's a "long shot" he will surpass his rival for the world No. 1 ranking.

However, Nadal has pulled out of Basel to rest his sore knee, which means Federer can cut the US Open champion's lead by 500 points if he wins Basel. That would put the top spot back in play with 1,000 points on the line in Paris and 1,500 points going to the London champion.

Prior to winning Shanghai, Federer said finishing as year-end No. 1 was "highly unlikely", but now believes he has a shot.

"Finishing the year as world No 1 is a long shot, and I don't think it will happen," Federer said. "But if I play like this, who knows? Maybe I will get close again."